var timeToWait : float = 2;
private var timer : float = 0;
var beginSpawn : boolean = false;
var prefab : Transform; // My object expecting to spawn but it's not.
private var spawnPoint : Vector3;
var SpawnPoint: Transform;// where I want my object to spawn.

// I copied from karl but it's not working and it kept silent and not instantiate the object I expected so how should I go from here please HELP.
Update(){
 while(cur2Health <= 0){
        if(beginSpawn==true)
        {
            spawnPoint = this.transform.position;
            timer += 1*Time.deltaTime;
            if(timer >= timeToWait)     
            {
                Instantiate (prefab, spawnPoint, this.transform.rotation);

                Destroy(gameObject); // This ensures that the instantiation only occurs once
            } 
        }
    }
}

Hi all Unities please help me. O ye this is just fragment of my whole code body even though no compilation error but it just not spawning as expected timer.